CBSE CLASS 10 | S. CHAND PHYSICS | REFLECTION OF LIGHT | COMPLETE NUMERICALS (CONCAVE MIRROR) |

Описание: Question 1
If the magnification of a body of size 1 m is 2, what is the size of the image ?

Question 2
What is the position of the image when an object is placed at a distance of 20 cm from a concave mirror of focal length 20 cm ?

Question 9
Describe the nature of image formed when the object is placed at a distance of 20 cm from a concave mirror of focal length 10 cm.

Question 11
An object is placed at a distance of 10 cm from a concave mirror of focal length 20 cm.
(a) Draw a ray diagram for the formation of image.(b) Calculate the image distance.(c) State two characteristics of the image formed.

Question 12
If an object of 10 cm height is placed at a distance of 36 cm from a concave mirror of focal length 12 cm, find the position, nature and height of the image.


Question 13
At what distance from a concave mirror of focal length 10 cm should an object 2 cm long be placed in order to get an erect image 6 cm tall ?


Question 14
When an object is placed at a distance of 15 cm from a concave mirror, its image is formed at 10 cm in front of the mirror. Calculate the focal length of the mirror.


Question 15
An object 3 cm high is placed at a distance of 8 cm from a concave mirror which produces a virtual image 4.5 cm high :
(i) What is the focal length of the mirror ?
(ii) What is the position of image ?
(iii) Draw a ray-diagram to show the formation of image.

Question 16
A converging mirror forms a real image of height 4 cm of an object of height 1 cm placed 20 cm away from the mirror :(i) Calculate the image distance.
(ii) What is the focal length of the mirror ?


Question 17
An object of size 7.0 cm is placed at 27 cm in front of a concave mirror of focal length 18 cm. At what distance from the mirror should a screen be placed so that a sharp focussed image can be obtained ? Find the size and nature of image.



Question 18
An object 3 cm high is placed at a distance of 10 cm in front of a converging mirror of focal length 20 cm. Find the position, nature and size of the image formed.

Question 19
A concave mirror has a focal length of 4 cm and an object 2 cm tall is placed 9 cm away from it. Find the nature, position and size of the image formed.

Question 20
When an object is placed 20 cm from a concave mirror, a real image magnified three times is formed. Find : (a) the focal length of the mirror.(b) Where must the object be placed to give a virtual image three times the height of the object ?


Question 21
A dentist’s mirror has a radius of curvature of 3 cm. How far must it be placed from a small dental cavity to give a virtual image of the cavity that is magnified five times ?

Question 22
A large concave mirror has a radius of curvature of 1.5 m. A person stands 10 m in front of the mirror. Where is the person’s image ?


Question 23
An object of 5.0 cm size is placed at a distance of 20.0 cm from a converging mirror of focal length 15.0 cm. At what distance from the mirror should a screen be placed to get the sharp image ? Also calculate the size of the image.


Question 24
A concave mirror produces three times enlarged virtual image of an object placed at 10 cm in front of it. Calculate the radius of curvature of the mirror.


Question 25
A bright object 50 mm high stands on the axis of a concave mirror of focal length 100 mm and at a distance of 300 mm from the concave mirror. How big will the image be ?


Question 26
How far should an object be placed from the pole of a converging mirror of focal length 20 cm to form a real image of the size exactly 1/4 th the size of the object ?

Question 27
When an object is placed at a distance of 50 cm from a concave spherical mirror, the magnification produced is, – 1/2 . Where should the object be placed to get a magnification of, -1/5 ?


Question 28
An object is placed (a) 20 cm, (b) 4 cm, in front of a concave mirror of focal length 12 cm. Find the nature and position of the image formed in each case.


Question 29
A concave mirror produces a real image 1 cm tall of an object 2.5 mm tall placed 5 cm from the mirror. Find the position of the image and the focal length of the mirror.


Question 30
A man holds a spherical shaving mirror of radius of curvature 60 cm, and focal length 30 cm, at a distance of 15 cm, from his nose. Find the position of image, and calculate the magnification.












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